java - 了解在 Android 中更改点击叠加标记的代码

Question

我尝试了answer by Sherif elKhatib至 How to change the marker for the overlay on tap for android? ，但有些事情我不明白。

protected boolean onTap(int index)
{
    // Here, what is mOverlays? I mean it is the object of what?
    OverlayItem item = mOverlays.get(index);
    // Is the mContext, the object of Context?
    Drawable marker = mContext.getResources().getDrawable(R.drawable.icon);
    marker.setBounds(0,0,marker.getIntrinsicWidth(),marker.getIntrinsicHeight());
    item.setMarker(marker);
    return true;
}

什么是mOverlays和mContext？

Answer 1

What are mOverlays and mContext?

mOverlays大概是 List<OverlayItem> ，因为它响应 get()与 OverlayItem .

mContext是 Context ，可能是你的MapActivity .